Secular parties must unite at national level to defeat BJP: Siddaramaiah

The current physical distancing guidelines provided by the World Health Organisation (WHO) and by the US Centers for Disease Control and Prevention (CDC) may not be adequate to curb the coronavirus spread, according to a research which says the gas cloud from a cough or sneeze may help virus particles travel up to 8 metres. The research, published in the Journal of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.

Study author, MIT associate professor Lydia Bourouiba, warned that droplets of all sizes can travel 23 to 27 feet, or 7-8 metres, carrying the pathogen.

According to Bourouiba, the current guidelines are based on "arbitrary" assumptions of droplet size, "overly simplified", and "may limit the effectiveness of the proposed interventions" against the deadly pandemic.

 She explained that the old guidelines assume droplets to be one of two categories, small or large, taking short-range semi-ballistic trajectories when a person exhales, coughs, or sneezes.

However based on more recent discoveries, the MIT scientist said, sneezes and coughs are made of a puff cloud that carries ambient air, transporting within it clusters of droplets of a wide range of sizes.

Bourouiba warned that this puff cloud, with ambient air entrapped in it, can offer the droplets moisture and warmth that can prevent it from evaporation in the outer environment.

"The locally moist and warm atmosphere within the turbulent gas cloud allows the contained droplets to evade evaporation for much longer than occurs with isolated droplets," she said.

"Under these conditions, the lifetime of a droplet could be considerably extended by a factor of up to 1000, from a fraction of a second to minutes," the researcher explained in the study.

The MIT scientist, who has researched the dynamics of coughs and sneezes for years, added that these droplets settle along the trajectory of a cough or sneeze contaminating surfaces, with their residues staying suspended in the air for hours.

"Even when maximum containment policies were enforced, the rapid international spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness of some procedures used to limit the spread of respiratory disease," Bourouiba wrote in the study

Bengaluru, Apr 27: Lord Chancellor and Secretary of State for Justice in the United Kingdom (UK), Robert Buckland, on Sunday appreciated Karnataka Chief Minister BS Yediyurappa for the measures taken to control COVID-19 and strict implementation of lockdown in the state.

"During an interaction with Kannadigas in England, Buckland sought information about control of COVID-19 in India, especially in Karnataka. 

The Chief Minister replied to his queries and explained that effective implementation of lockdown, maintaining food and essential commodities supply chain intact and the concern of the government that no one should go hungry, has made it possible, with immense support and cooperation from people," as per a press release from Karnataka Chief Minister's Office (CMO).

Economic activities would be started according to the guidelines of the central government in a phased or graded manner in the coming days, the Chief Minister said, who also held a video conference with some people from the state, who stay in London, amid coronavirus lockdown.

During the interaction, the Chief Minister assured the Kannadigas residing abroad that they need not worry about their parents or elders in the state as their well-being would be taken care of.

He said that they can contact helpline numbers for medial and other needs.

The Chief Minister also said that the government would consider the loan repayment issues of students studying abroad availing educational loans after the situation turns to normal.

He said that the Karnataka government would be in touch with the Centre regarding the rescue of Kannadigas stranded abroad only after international flight services resume.

Mysuru, Feb 21: Chief Minister B S Yediyurappa said Amulya Leona, who raised pro-Pakistan slogans, had links with Naxalites.

Yediyurappa said that Amulya's links with Naxalites have been proved in an investigation. "She must be punished and action will be taken against the people behind it," he said.

"Bail should not be given to Amulya. Her father has also said he won't protect her. Its proved now that she had contacts with Naxals. Proper punishment should be given," he added.

While speaking to reporters at Mysuru Airport, the chief minister said unless actions are taken against the organisations who provoke them to make such comments, it is not possible to control them.

Yediyurappa suspects that the incident was a conspiracy to disturb peace and harmony in the state.

Minister B C Patil said that such incidents should not repeat. "It appears that youths are misused for such anti-national activities, he said.